::The Moths of Borneo::

SUBFAMILY EUSTROTIINAE

Cretonia acuticosta sp. n. (Plate 3, Figs 114, 124)

GG, EE 10-11mm. This species is more uniform in forewing facies than most congeners except brevioripalpus. The male genitalia have the costal process of the valve considerably produced into a long, somewhat distally directed, horn‑like spine. The saccular process is reduced and the cucullus is rather truncate or spatulate. The juxta is small, bifid, resembling the horns of a bull. The aedeagus vesica is large, with three diverticula, the longest terminating in a massive, straight cornutus. The female genitalia have a moderate, narrow ductus bursae. The corpus bursae is large, with an elongate sclerotised expansion on one side opposite a narrower bulge on the other, all corrugated; distal to this is the scobinate apical part.

Holotype G. [INDIA: Assam]: Khasis, June 1891, Nat. Coll., BM noctuid slide 21147.

Paratypes: 1G (slide 21098) as holotype but April; 1E (slide 21151) as holotype but Oct.

Geographical range. India, Taiwan, Sumatra, Java, Bali, Borneo, Halmahera (slide 21144).

Habitat preference. All Bornean material is from the lowlands, probably associated with disturbance and habitation, e.g. Tenom and Penungah in Sabah, Bidi in Sarawak. The only specimens with more precise data are from Sarawak: a female from the foot of G. Dulit at the Tinjar / Lejok river junction; a male from regenerating alluvial forest at 50m on the banks of the S. Tutoh near Long Pala at the foot of G. Mulu.

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